CD34 and chronic myelogenous leukemia, BCR-ABL1 positive: In agreement with our observations, analysis of one publicly available microarray experiment dataset on 4-HPR-treated and untreated CD34+ cells from four chronic myeloid leukemia patients (GEO Accession: GSE17480) showed that the retinoid induced a six-fold increase in AF1q mRNA expression (P<0.01) (Figure S1).